SH7708 Datasheet, PDF (388/633 Pages) Renesas Technology Corp – SuperH™ RISC engine

Start transmission
Read TDRE bit in SCSSR
(1)
No
TDRE = 1?
Yes
Write transmit data to TDR and
clear TDRE bit in SCSSR to 0
(2)
No
All data transmitted?
Yes
Read TEND bit in SCSSR
No
TEND = 1?
Yes
Break output?
Yes
Clear SPB0DT to 0
and set SPB0IO to 1
No
(3)
Clear TE bit in SCSCR to 0
End transmission
Note: Numbers in parentheses refer to the preceding procedure.
Figure 13.5 Sample Flowchart for Transmitting Serial Data
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